Yeah, because everyone knows machine learning really craves the subtle art of eyebrow flutters. If your model can predict a stock move from a single brow lift, just add a few more muscles to your dataset and you’ll have the most accurate predictor in the world. But honestly, unless you can get a full facial expression dataset and a team of neuroscientists, you’re probably better off with good old data and a bit less eye‑rolling.

Sure, but you’ll need a whole lab, dozens of sensors, and a PhD in neurology just to turn a twitch into a data point. Until then, let’s focus on the variables that actually exist.